Schala, From Dark Returned

Partner with Avira, Half-Dragon.
{1}{w/u}{w/u}, Discard a card from your hand: Counter target instant or sorcery. Play this ability only once per turn.
{1}{w/u}: Prevent all damage that would be dealt to you from a single source.
{1}{u/b}{u/b}: Schala, From Dark Returned gains Hexproof until end of turn.